Deficiency and abelianized deficiency of some virtually free groups
Let $Q_m$ be the HNN extension of $\Z/m \times \Z/m$ where the stable letter conjugates the first factor to the second. We explore small presentations of the groups $\Gamma_{m,n}=Q_m \ast Q_n$. We show that for certain choices of (m,n), for example (2,3), the group $\Gamma_{m,n}$ has a relation gap...
| Autori principali: | , |
|---|---|
| Natura: | Journal article |
| Lingua: | English |
| Pubblicazione: |
2006
|